Delete Sensitive Lenny Guy Apr 26, 2015 at 07:27PM EDT It makes me sad how many people I meet who mistakenly believe they can't learn Calculus. It's a failure of the subject material, not of the student. +64 Reply
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Lenny Guy
Apr 26, 2015 at 07:27PM EDT
Takashi.0
Apr 26, 2015 at 05:41PM EDT